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Christmas trees discarded after the holidays have started to be used on Maine beaches to restore dunes hit by storms, trap wind-blown sand, and reinforce the natural coastal protection against erosion in vulnerable areas of the United States coastline.
Christmas trees discarded after the holidays have become part of coastal recovery projects in Maine, USA, where local teams use dried pines to hold sand, restore dunes affected by storms, and reinforce the natural protection of beaches exposed to erosion.
The measure repurposes trees that would normally be shredded or discarded and incorporates them into coastal recovery interventions.
When placed over damaged sections of the beach, they function as temporary barriers, reduce wind speed near the ground, and create points where sand grains can accumulate.
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According to the National Oceanic and Atmospheric Administration of the United States, NOAA, the initiative gained momentum after a storm hit the Maine coast at the end of December 2022 and caused extensive erosion on the state’s beaches.
After the storm, Bristol, Phippsburg, and South Portland began positioning trees washed up by water and discarded Christmas pines in areas of weakened dunes, with participation from the Maine Geological Survey and local coastal management programs.
How Christmas trees help restore dunes
On sandy beaches, dunes form a barrier between the sea and areas occupied by people, reducing the force of waves, high tides, and swells before the water reaches streets, parking lots, boardwalks, and nearby buildings.
When intense storms hit these environments, the front of the dunes can be cut, vegetation can be removed, and the beach tends to become lower, which increases the exposure of coastal structures and habitats.
Under these conditions, recovery depends on the natural circulation of sediments, the action of winds, the movement of tides, and the presence of obstacles capable of retaining sand at strategic points along the coastal strip.
The discarded pines act as temporary sand traps in this dune restoration process.
Branches, trunks, and needles form small retention zones, where sand carried by the wind or deposited by waves begins to accumulate gradually and contributes to new elevations on the beach.
Over time, part of the wood becomes covered by sediment, while the dry structure, visible at the beginning of the process, tends to disappear under the sand and serve as a base for typical dune vegetation.
Experiments on Maine Beaches
At Pemaquid Beach, in the town of Bristol, the storm made significant cuts in the dunes, and the local parks department positioned logs carried by the water at the base of the eroded areas.
The intervention aimed to reinforce the damaged section and accelerate sand retention, according to information released by NOAA about coastal restoration projects carried out in the state of Maine.
According to the American agency, in four months the logs placed in front of the dunes had already retained sediments, while opportunistic plant species began to appear in monitored areas.
Additionally, dune grasses began to establish themselves in parts of the recovered area, a stage considered important for fixing the sand and favoring the continuation of the natural recomposition process.
At Popham Beach State Park, in Phippsburg, the storm flattened extensive dune areas and contributed to the displacement of the Morse River channel, according to NOAA’s technical report.
In that section, dozens of logs dragged by the water were aligned parallel to the coast to reproduce natural sand ridges and create retention points along the beach.
At Willard Beach, in South Portland, erosion threatened buried infrastructure in the coastal strip, leading to the adoption of a similar strategy with discarded Christmas trees.
To contain the advancement of the problem, more than 200 Christmas trees were distributed in rows parallel to the beach, in an intervention carried out with specific environmental authorization.
Nature-Based Coastal Protection
The technique uses, in certain sections, a solution based on natural processes instead of rigid interventions, such as coastal walls or other permanent containment structures.
In this approach, teams use organic materials to reproduce obstacles present in beach environments, aiming to favor the gradual accumulation of sand in eroded areas.
This type of intervention is associated with the so-called green infrastructure, a concept used to describe actions that work with the natural dynamics of the coast instead of just blocking its movements.
The proposal does not eliminate erosion nor prevent new storms, but it can reinforce areas where the dune system has lost volume, height, and vegetation cover after high-energy events.
In addition to protection against storm surges, restored dunes contribute to the preservation of coastal habitats, as the vegetation fixes the sand with its roots and creates conditions for the area to be used by different species.
Birds and other animals depend on preserved sandy areas for feeding, shelter, and reproduction, especially in sections where beach vegetation helps maintain environmental stability.
At the beginning of the intervention, rows of dry, undecorated, and partially buried trees become visible on the beach, distributed at points defined by the teams responsible for coastal recovery.
Over the months, the technical expectation is that wind and waves will cover these materials with sand, incorporating the pines into the structure of the dune being restored.
Reuse of Pines on the U.S. Coastline
The experience in Maine also had technical value by testing, in the state, a form of tree reuse that had not yet been applied in this way, according to NOAA.
For the American agency, the projects demonstrated the feasibility of using discarded wood to reinforce and restore eroded dunes, provided the intervention is planned and monitored by specialized teams.
The result depends on factors such as the position of the trees, the amount of available sand, wind strength, tide intensity, and the return of coastal vegetation in each monitored section.
For this reason, the technique requires specialized monitoring and integration with local beach management, as well as environmental permits when the intervention occurs in sensitive coastal areas.
After decorating homes and shop windows during Christmas, the pines go on to fulfill an environmental role on the Maine coast by being incorporated into projects to recover dunes affected by storms.
Instead of just being shredded or discarded, some of these trees are used to help rebuild natural barriers that protect beaches, ecosystems, and structures near the sea.
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